void fp12_inv(fp12_t c, fp12_t a) {
fp6_t t0;
fp6_t t1;
fp6_null(t0);
fp6_null(t1);
TRY {
fp6_new(t0);
fp6_new(t1);
fp6_sqr(t0, a[0]);
fp6_sqr(t1, a[1]);
fp6_mul_art(t1, t1);
fp6_sub(t0, t0, t1);
fp6_inv(t0, t0);
fp6_mul(c[0], a[0], t0);
fp6_neg(c[1], a[1]);
fp6_mul(c[1], c[1], t0);
} CATCH_ANY {
THROW(ERR_CAUGHT);
} FINALLY {
fp6_free(t0);
fp6_free(t1);
}
}
void fp18_neg(fp18_t c, fp18_t a) {
fp6_neg(c[0], a[0]);
fp6_neg(c[1], a[1]);
fp6_neg(c[2], a[2]);
}
void fp12_neg(fp12_t c, fp12_t a) {
fp6_neg(c[0], a[0]);
fp6_neg(c[1], a[1]);
}
void fp12_inv_uni(fp12_t c, fp12_t a) {
/* In this case, it's a simple conjugate. */
fp6_copy(c[0], a[0]);
fp6_neg(c[1], a[1]);
}